| Term Name: | primary head sinus | 
|---|---|
| Synonyms: | lateral head vein, PHS | 
| Definition: | Main route for venous drainage of the anterior and mid cerebral veins as well as portions of the primordial hindbrain channel. | 
| Appears at: | Hatching:Long-pec (48.0h-60.0h) | 
| Evident until: | Unknown | 
| Ontology: | Anatomy Ontology [ZFA:0005026] | 
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